MRTG and MIB confusion

[milkacow]

Hello all. I am looking for some assistance using mrtg with a snmp
capable temperature monitor in my server room. i have been battling
this for two days now and can't figure this out.

I installed the TemPager MIB i got from AVTech onto my debian box
into /usr/share/snmp/mibs folder. after much trial and error (never
used snmp aside from mrtg and monitoring ethernet connections) i got
the following to work:

debian:/etc# snmpgetnext -c public -v1 192.168.66.119 TEMPAGER-
MIB:tempReading1F
TEMPAGER-MIB::tempReading1F.0 = INTEGER: 8172

or

debian:/etc# snmpget -Cf -v1 -c public 192.168.66.119 TEMPAGER-
MIB:tempReading1F.0
TEMPAGER-MIB::tempReading1F.0 = INTEGER: 8172

or

debian:/etc# snmpwalk -c public -v1 192.168.66.119 TEMPAGER-
MIB:tempReading1F
TEMPAGER-MIB::tempReading1F.0 = INTEGER: 8172

and
debian:/etc# snmptranslate -On TEMPAGER-MIB:tempReading1F
.1.3.6.1.4.1.20916.1.1.1.1.5

Above INTEGER is the correct reading of the temperature inside the
rack, as the device has a web interface. I know its a little warm,
but the whole reasoning behind this project is to convince upper
management to invest in better cooling devices.

On any note.

I have a mrtg config file with the following:
----------------------------------------
LoadMIBs: /usr/share/snmp/mibs/tempager.mib.txt
Target[tempager.s1]: 1.3.6.1.4.1.20916.1.1.1.1.5:***@192.168.66.119
PageTop[tempager.s1]: <H1>Temperature In Rack</H1>
WorkDir: /var/www/mrtg/temp
Options[tempager.s1]: nopercent,growright,gauge,noinfo
MaxBytes[tempager.s1]: 10000
Title[tempager.s1]: Temperature In Rack
YLegend[tempager.s1]: Degrees in F
ShortLegend[tempager.s1]: Degrees
LegendI[tempager.s1]: temp:
LegendO[tempager.s1]:
Legend1[tempager.s1]: temperature

----------------------------------------

then running mrtg i get:
-------------------------------------------
debian:/etc# mrtg mrtg-temp.cfg
SNMP Error:
Received SNMP response with error code
error status: noSuchName
index 1 (OID: 1.3.6.1.2.1.2.2.1.10.5)
SNMPv1_Session (remote host: "192.168.66.119" [192.168.66.119].161)
community: "public"
request ID: 1159437221
PDU bufsize: 8000 bytes
timeout: 2s
retries: 5
backoff: 1)
at /usr/share/perl5/SNMP_util.pm line 490
SNMPGET Problem for ifInOctets.5 ifOutOctets.5 sysUptime sysName on
***@192.168.66.119::::::v4only
at /usr/bin/mrtg line 1840
ERROR: Target[tempager.s1][_IN_] '1.3.6.1.4.1.20916.1.1.1.1. $target-

[0]{$mode} ' (warn): Use of uninitialized value in concatenation (.)

or string at (eval 6) line 1.
ERROR: Target[tempager.s1][_OUT_] '1.3.6.1.4.1.20916.1.1.1.1. $target-

[0]{$mode} ' (warn): Use of uninitialized value in concatenation (.)

or string at (eval 7) line 1.

-------------------------------------------------

firstly, it looks like its trying to poll something not specified:

debian:/etc# snmptranslate 1.3.6.1.2.1.2.2.1.10.5
IF-MIB::ifInOctets.5

secondly, i have no idea what mrtg is doing since there is the 5
missing from the Error line.

I have tried changing the target to anyway i can think of, with no
success.

Is there something wrong with my target line?

thanks in advance,
-Dustin

[Niels Baggesen]

Post by milkacow
debian:/etc# snmpwalk -c public -v1 192.168.66.119 TEMPAGER-
MIB:tempReading1F
TEMPAGER-MIB::tempReading1F.0 = INTEGER: 8172
and
debian:/etc# snmptranslate -On TEMPAGER-MIB:tempReading1F
.1.3.6.1.4.1.20916.1.1.1.1.5
LoadMIBs: /usr/share/snmp/mibs/tempager.mib.txt

This is not needed, as you are using numeric oids anyway

Post by milkacow
debian:/etc# snmptranslate 1.3.6.1.2.1.2.2.1.10.5
IF-MIB::ifInOctets.5

Remember, mrtg expect both an in and an out value. If you have only one,
duplicate it.

Secondly, your snmpwalk showed the oid with the expected .0 instance,
which you did not specify.

Try with
Target[tempager.s1]:
1.3.6.1.4.1.20916.1.1.1.1.5.0&1.3.6.1.4.1.20916.1.1.1.1.5.0:***@192.168.66.119

/Niels

[milkacow]

Post by Niels Baggesen

Post by milkacow
debian:/etc# snmpwalk -c public -v1 192.168.66.119 TEMPAGER-
MIB:tempReading1F
TEMPAGER-MIB::tempReading1F.0 = INTEGER: 8172
and
debian:/etc# snmptranslate -On TEMPAGER-MIB:tempReading1F
.1.3.6.1.4.1.20916.1.1.1.1.5
LoadMIBs: /usr/share/snmp/mibs/tempager.mib.txt

This is not needed, as you are using numeric oids anyway

Post by milkacow
debian:/etc# snmptranslate 1.3.6.1.2.1.2.2.1.10.5
IF-MIB::ifInOctets.5

Remember, mrtg expect both an in and an out value. If you have only one,
duplicate it.
Secondly, your snmpwalk showed the oid with the expected .0 instance,
which you did not specify.
Try with
/Niels
--
The purpose of computing is insight, not numbers -- R W Hamming

that did the trick! thanks much!

-Dustin